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MARA HORWITZ
NPI 1275507691
Specialist in Pittsburgh, PA

Active since February 14, 2006PECOS Enrolled
77.5/100
CMS Quality Rating
3601 5TH AVE, FALK CLINIC, SUITE 2B, PITTSBURGH, PA 15213(412) 648-9577 Get Directions Write a Review

NPPES record last updated: March 25, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mara Horwitz NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARA HORWITZ (NPI 1275507691) is an individual specialist in Pittsburgh, Pennsylvania, licensed in Pennsylvania (MD044459E) and active in the NPI registry since February 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1275507691
Entity TypeIndividualFemale
Primary Taxonomy174400000X
Provider Legal NameMARA HORWITZ
Location Address3601 5TH AVE, FALK CLINIC, SUITE 2BPittsburgh, PA 15213-3403
Mailing Address3601 5th Ave, Falk Clinic, Suite 2bPittsburgh, PA 15213-3403
Phone(412) 648-9577
Sole ProprietorNo
Enumeration DateFebruary 14, 2006
Last NPPES UpdateMarch 25, 2021
✔ NPI 1275507691 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in PA · MD044459E
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
3601 5TH AVE, Pittsburgh, PA 15213
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mara Horwitz is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Mara Horwitz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Pittsburgh Physicians
0.1 mi
Internal Medicine
3500 5TH AVE, 4TH FLOOR
Pittsburgh, PA 15213
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 7,114 clinicians in this Medicare group
NPI 1548433527 (412) 682-2434

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

77.5/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality68.61
Promoting Interoperability100
Improvement Activities40
Cost56.4

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CHRISTINE PEOPLES
Internal Medicine (Rheumatology)
3601 5TH AVE, SUITE 3B FALK MEDICAL BUILDING
PITTSBURGH, PA 15213
Allegheny County (412) 647-6700
RIMA ABDEL MASSIH
Internal Medicine
3601 5TH AVE, SUITE 3A
PITTSBURGH, PA 15213
Allegheny County (412) 648-6273
NOEL PREVOST
Physician Assistant
3601 5TH AVE, SUITE 5A FALK MEDICAL BUILDING
PITTSBURGH, PA 15213
Allegheny County (412) 648-3263
MELODY IVES CRNP
Internal Medicine (Endocrinology, Diabetes & Metabolism)
3601 5TH AVE
PITTSBURGH, PA 15213
Allegheny County (412) 383-8700
PETER VELDKAMP
Specialist
3601 5TH AVE, 610 FALK MEDICAL BUILDING
PITTSBURGH, PA 15213
Allegheny County (412) 647-5399
DR. BRIAN A. POTOSKI PHARM.D.
Pharmacist (Pharmacotherapy)
3601 5TH AVE, FALK MEDICAL BLDG., SUITE 3A
PITTSBURGH, PA 15213
Allegheny County (412) 648-6401
MS. LAURA ELIZABETH HARNISH RDN
Dietitian, Registered
3601 5TH AVE, STE 1-B, ROOM 145-B
PITTSBURGH, PA 15213
Allegheny County (412) 692-4497
LAURA FERRIS
Specialist
3601 5TH AVE, SUITE 5A FALK MEDICAL BUILDING
PITTSBURGH, PA 15213
Allegheny County (412) 648-3263

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mara Horwitz's NPI number?

The NPI number for Mara Horwitz is 1275507691. It was assigned to this individual provider in the NPPES registry on February 14, 2006.

Where is Mara Horwitz located?

Mara Horwitz practices at 3601 5th Ave Falk Clinic, Suite 2B, Pittsburgh, PA 15213. The listed phone number is (412) 648-9577.

What is Mara Horwitz's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Mara Horwitz enrolled in Medicare?

Yes. Mara Horwitz is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mara Horwitz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mara Horwitz reassigns Medicare benefits to University Of Pittsburgh Physicians (Pittsburgh, PA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mara Horwitz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mara Horwitz was last updated on March 25, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.